Effect sizes are not uniform, though
GPs can prescribe B12 injections following appropriate investigation, which should include: Full blood count to identify macrocytic anaemia Serum B12 and folate levels to confirm deficiency (using laboratory-specific reference ranges) Methylmalonic acid and/or homocysteine when B12 results are borderline Intrinsic factor antibodies if pernicious anaemia is suspected Additional tests depending on clinical presentation (e.g., thyroid function, coeliac serology) When both B12 and folate deficiency are present, B12 should be replaced before folate to avoid precipitating subacute combined degeneration of the spinal cord
But you need to maintain your hydration levels
A B12 shot gets absorbed gradually as the muscle tissue releases the nutrient into the bloodstream over hours to days
Most people notice the first changes in physique and body circumferences after about 2-4 weeks of systematic use, while maintaining healthy eating habits
I was also dieting, not heavy but I cut back on a lot of junk food and Ive probably only lost 4-5 pounds since taking the product